Rotary plunger pump



March 14, 1933. s. A. JOHNSON ROTARY PLUNGER PUMP Filed Dec. 51, 1950 Patented Mar. 14, 1933 UNITED STATES SVEN A. JOHNSON, OF BROOKLYN, NEW YORK ROTARY PLUNGER PUMP Application filed December 81, 1930. Serial No. 505,702.

This invention relates to a rotary plunger pump and in particular to one having a high degree of efficiency.

A particular object of my invention is to provide in a pump of the character referred to, a rotor in which is mounted suitable suction and expulsion pistons controlled by an eccentric ring so that the continuouspumping action is obtained with a noiseless operation.

A further important object of my invention is to provide a pump of the character referred to which will run in either direction and may be adapted for use with a machine whose di- 5 rection of rotation cannot be changed, means being employed in the pump for a slight change which will adapt the pump to the operation in a direction to coincide with the operation of the machine in connection with which it is to be employed.

A still further object of my invention is to provide a pump in which no acking 1s required, which is of an anti-sip on nature 1n action, operates with high pressure and pro-' vides a high vacuum or suction to draw in and expel the liquid, the pump being particularly adapted for use in raising and pumping heavy oils which it has been found difficult to handle heretofore due to their viscosity.

Changes and variations may be made in the construction shown and described without departing from the principles of the invention or sacrificing its chief advantages; hence such invention is not to be confined to the structures shown in the accompanying drawing.

Figure 1 is a view in elevation, partly in section illustrating the construction of my pump andthe operating parts thereof.

Figure 2 is a section taken on the line 22 of Figure 1 and shows the relative arrangement of the rotor and the eccentric ring and eccentric member.

Figure 3 is an enlarged section taken on the line 33 of Figure 1 and illustrates the selfcentering wear seat as employed in connection with the eccentric ring.

Figure 4 is a section taken on the line 4-4 of Figure 1 illustrating the sealing ring employed at one end of the rotor, and

Figure 5 is a view in end elevation of the head end of the pump illustrating the outlet and intake conduit connected thereto.

Referring to the drawing in detail, 5 indicates a base member which is cast as part of a pump housing or casing 6 formed to provide the chamber portion 7 and rotor journal end 8. This rotor journal end is reduced in diameter as at 9 and bevelled as at 10 to provide a sealing seat in combination with the bevco elled portion 11'of a driving shaft 12 which, through the medium of an intermediate portion 13 is secured integrally with the rotor 14. The shaft 12 extends through a suitable open.- ing in the end of the rotor journal portion and through the medium of any standard coupllng 15 may be secured to the power shaft 16. The rotor 14 is shaped to provide the piston head 17 in which is disposed the cylinders 18 cut radially therein and arranged to open into the bore 19 provided in one end of the rotor 14. The end face of the plston head 17 is concentrically grooved as at 20 and provided with a spring packing 21 upon top of which is placed the packing ring 22 which has a snug fit within the groove 20, and is arranged to be normally urged outward a short distance by the spring packing 21 so that the ring cooperates with the re cessed face 23 formed concentrically in the flanged portions 25 of the pump head 26.

The radial cylinders 18 have slidably mounted therein, the pistons or plungers 27, the lower ends of which within the cylinders 18 are provided with one or more piston rings 28 and the upper ends of which are provided with the concave depressions 29 in which are loosely positioned, the arcuately shaped self centering wear seats 30, whose outer surfaces conform to the contour of the inner and outer surfaces of thering 31 to be described. Secured as,by the screws 32 to the inner wall of the chambered portions 7 of the housing 6 is the eccentric disk 33, whose periphery is eccentric with respect to the opening 34'through which passses the rotor body 14, the periphcry of the eccentric disk 33 being arranged to receive thereover, the ring 31 mounted eccentrically and whose projecting portion is engaged by the slotted upper end of the pistons 27% illustrated in Figure 1 so that self-centering wear seats slide on the ring 31 as the rotor is revolved and carries with it, the pistons which, during their revolutionary movement, operate toward and away from the center and provide the necessary suction and expulsion movement to carry out the pumping operation.

The pump head 26 is provided with a chambered rotor bearing stud 35 which is forced into the head 26 and is provided with the bores 36 and 37, these bores being closed at the ends by the plugs 38. The bores 37 and 36 of the conduit chamber register with the bores 39 and 40. respectively provided in the boss extensions 41 of the head, the openings 39 and 40 being enlarged to receive the pipes 42 which provide for the intake and outlet of the fluid depending upon which direction the pump is rotating.

The stud 35 is further provided with two openings, one from each of the bores 36 and 37 at a point in the chamber that will be in register with the cylinders 18,'these openings being horizontal and indicated by the numeral 43, one only being shown in Figure 1. The outer end of these openings 43 are bevelled or chamfered out as at 44 in order to provide, as illustrated in Figure 2, for the gradual discharge and intake of, the cylinders 18 in their passage around this conduit chamber.

It will be noted that the inner ends of the pistons 27are curved as at 45 to fit the contour of the conduit chamber 35 over the surfaces of which they will revolve when they are in their depressed position. A suitable threadved opening 46 is provided diametrically opposite the screw 32 which holds the eccentric 33 in position so that when the change of direction of rotation of the pump is necessary to adapt it for use in connection with a machine whose rotation cannot be changed, the eccentric ring can be removed from the position shown and the screw 32 may be employed in the opening 46 to maintain the eccentric in another adjusted position.

In the operation of my device, the drive shaft 16 of the machine to which the pump is secured will, through the coupling 15, drive the shaft 12 which is an integral part of the rotor 14 with the result that therotor will ,revolve at high speed and revolve with it the pistons 27 which, riding on the ring 31, will be caused to move toward and away from the,

center of the pump and provide the necessary suction and expulsion force in order to carry out the pumping operation.

As an example. in Figure 2, the pump is assumed to be'operating in the direction of the arrow-and when the piston travels around to the right, it will be moved away from the center with the result that it will suck the oil or liquid in through the conduit-s 36 and through the conduit 39 from the intake 42 and fill up the cylinder 18, this gradual filling up of the cylinder starting just as soon as the cylinder opening comes over the chamfered edge 44 of the outlet 43 with the result that during its travel downwardly, the piston moves out and fills the chamber or cylinder with the liquid which is carried around and expelled through the other side or opening 43 pump permits its operation in either direction and it can be adapted to the direction of the machine with which it is employed by simply changing the position of the eccentric by the change of. the screws 32 as hereinbefore explained. The ring 31 may be so fitted over the disk 33 that it will revolve therearound in which event there will be less wear on the self-centering wear seat of the pistons and a uniform movement on the eccentric ring.

Another feature of my invention is the employment' of the packing ring or sealing ring 22, previously referred to, and it is to be noted that an additional feature is present in my invention in that all seepage toward the head i of the pump along the stud 35 will be imprisoned between the sealing ring 22 and the stud 35 with the result that the pressure of the oil building up, will force the rotor 14 longitudinally to eflectively seal the end thereof where the bevel surface 11 meets the bevelled surface 10 of the rotor housing with the result that the pump is leakproof and dispenses with packing with the single exception of its employment in order to make the ring 22 yieldable and self-fitting. The action of the rotor in being self-sealing at the cham-- fered surfaces 10 and 11 is also present when the vacuum is formed by the suction of the piston.

It is evident, therefore, that I have provided a liquid pump particularly adapted for the lifting and pumping of heavy oil which is continuous in operation, may operate .atv

.various changes and modifications may be made therein without departing from the scope of the invention or sacrificing the advantages derived from its use.

What I claim is z-- In a pump, a housing, a rotor in the housing, cooperating bevelled annular portions at one end of the rotor and housing, a. sealing ring carried in one end of the rotor and engaging a wall of the housing to provide a pressure chamber, pumping means in the rotor for creating a pressure in the chamber to maintain said bevelled portions in close contact, and fluid inlet and outlets in the housing.

In testimony whereof I afiix my signature.

SVEN A. JOHNSON. [LL 5.] 

